小型叠层橡胶支座的力学性能相关性

On Correlation of Mechanical Properties of Small Laminated Rubber Bearings

由于振动台使用的小型橡胶支座的尺寸并非同比例缩尺,与GB/T 20688.3—2006中的支座规格相差较远,需对其力学性能进行试验研究.文章对6个小型叠层橡胶支座的压缩和剪切性能进行研究,结果表明:GB/T 20688.3—2006中关于叠层橡胶支座竖向压缩刚度的计算方法不适用于小型缩尺橡胶支座,而剪切刚度的计算方法具有一定的参考性.因此,在振动台隔震试验前需对支座刚度进行测验,选取刚度较为接近的支座进行后续试验.压缩刚度的离散性造成的不均匀沉降极小,应优先考虑实测剪切刚度相近的支座.

Due to the non-proportional scaling of the dimensions of the small rubber bearings used in the vibration table,which differs significantly from the specifications in GB/T 20688.3-2006.It is necessary to investigate their mechanical properties through experiments.In this paper,the compression and shear properties of six small laminated rubber bearings are studied by experiments.The results show that the calculation method of vertical compression stiffness provided by GB/T 20688.3-2006 is not suitable for small scaled rubber bearings,while the calculation method of shear stiffness has some reference value.Therefore,before the isolation experiment on the vibration table,the stiffness of the bearings should be measured,and bearings with closer stiffness values should be selected for subsequent experiments.The differential settlement caused by the dispersion of compression stffness is minimal,so priority should be given to supports with similar horizontal shear stiffness.